Name:	ede_LiabilityForRefundOfProRataAmountOfOriginalCostOfExtensionToDevelopers
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the period for refund of pro rata amount of the original cost of the extension to developers.

No definition available.

Name:	ede_PeriodForRefundOfProRataAmountOfOriginalCostOfExtensionToDevelopers
Namespace Prefix:	ede_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the total amortization for continuing operations of public utilities, both capitalized and expensed during the reporting period.

No definition available.

Name:	ede_PublicUtilitiesAmortization
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the amount of municipal franchise taxes which are collected for and remitted to their respective entities and are recognized both as operating revenues and offset as operating expenses.

No definition available.

Name:	ede_PublicUtilityMunicipalFranchiseTaxes
Namespace Prefix:	ede_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ede_PublicUtilityMunicipalFranchiseTaxesAbstract
Namespace Prefix:	ede_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DepreciationAndAmortizationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 71

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.